<template>
  <div class="page-header-index-wide">
    <a-card :bordered="false">
      <a-button type="primary">添加顶级菜单</a-button>
      <a-tree :treeData="treeData">
        <template slot="custom" slot-scope="item">
          <span>{{ item.title }}</span>
          <a-button
            type="link"
            class="but_type"
            style="right: 200px"
            @click="() => append(item)"
            >新增</a-button
          >
          <a-button
            type="link"
            class="but_type"
            style="right: 120px"
            @click="() => edit(item)"
            >编辑</a-button
          >
          <a-button type="link" class="but_type" @click="(e) => remove(item)"
            >删除</a-button
          >
        </template>
      </a-tree>
    </a-card>
  </div>
</template>

<script>
const treeData = [
  {
    title: '0-0',
    key: '0-0',
    scopedSlots: { title: 'custom' },
    children: [
      {
        title: '0-0-0',
        key: '0-0-0',
        scopedSlots: { title: 'custom' },
        children: [
          { title: '0-0-0-0', key: '0-0-0-0', scopedSlots: { title: 'custom' } },
          { title: '0-0-0-1', key: '0-0-0-1', scopedSlots: { title: 'custom' } },
          { title: '0-0-0-2', key: '0-0-0-2', scopedSlots: { title: 'custom' } }
        ]
      },
      {
        title: '0-0-1',
        key: '0-0-1',
        scopedSlots: { title: 'custom' },
        children: [
          { title: '0-0-1-0', key: '0-0-1-0', scopedSlots: { title: 'custom' } },
          { title: '0-0-1-1', key: '0-0-1-1', scopedSlots: { title: 'custom' } },
          { title: '0-0-1-2', key: '0-0-1-2', scopedSlots: { title: 'custom' } }
        ]
      },
      {
        title: '0-0-2',
        key: '0-0-2',
        scopedSlots: { title: 'custom' }
      }
    ]
  },
  {
    title: '0-1',
    key: '0-1',
    scopedSlots: { title: 'custom' },
    children: [
      { title: '0-1-0-0', key: '0-1-0-0', scopedSlots: { title: 'custom' } },
      { title: '0-1-0-1', key: '0-1-0-1', scopedSlots: { title: 'custom' } },
      { title: '0-1-0-2', key: '0-1-0-2', scopedSlots: { title: 'custom' } }
    ]
  },
  {
    title: '0-2',
    key: '0-2',
    scopedSlots: { title: 'custom' }
  }
]

export default {
  data () {
    return {
      treeData,
    }
  },
  methods: {
    // 递归查找
    searchOption (option, arr, type = 'delect') {
      console.log(option, arr)
      for (let s = 0; s < arr.length; s++) {
        console.log(arr[s].key, option.key)
        if (arr[s].key === option.key) {
          if (type === 'delect') {
            arr.splice(s, 1)
          } else {
            //这是模拟数据编辑数据
            this.$set(arr, s, {
              title: '12121212',
              key: '12121212',
              scopedSlots: { title: 'custom' }
            })
          }
          break
        } else if (arr[s].children && arr[s].children.length > 0) { // 递归条件
          this.searchOption(option, arr[s].children)
        } else {
          continue
        }
      }
    },
    append (data) {
      //模拟添加
      const newChild = {
        title: 'ceshi1',
        key: 'ceshi1',
        scopedSlots: { title: 'custom' },
        children: []
      }
      if (!data.children) {
        this.$set(data, 'children', [])
      }
      data.children.push(newChild)
    },
    remove (data) {
      //先请求后端接口，删除成功后执行
      this.searchOption(data, this.treeData)
    },
    edit (data) {
      //先请求后端接口，编辑成功后执行
      this.searchOption(data, this.treeData, 'edit')
    },
  }
}
</script>
<style lang="scss" scoped>
.ant-tree-title {
  width: 100%;
}
.title {
  float: left;
}
.ant-card-body {
  :global {
    .ant-tree {
      line-height: 3;
      li {
        position: relative;
      }
    }
  }
}
.ant-card-body .but_type {
  float: right;
  position: absolute;
  right: 40px;
  z-index: -1;
}
</style>
<style>
.ant-tree li .ant-tree-node-content-wrapper.ant-tree-node-selected {
  /* background-color: transparent !important; */
}
.ant-tree li:hover {
  /* background: pink; */
  cursor: pointer;
}
.ant-tree li .but_type {
  display: none;
}
.ant-tree li:hover .but_type {
  display: block !important;
}
.ant-tree li .ant-tree-node-content-wrapper:hover {
  background-color: red;
}
</style>
